US3102991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonar equipment for single-transducer operation
Assignee: ELAC Electroacustic GmbH
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Filing: 1959-07-15
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Granted: 1963-09-03
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Expires: 1979-07-15
Abstract
No abstract record available.
Inventors
- 👤 Jess Harring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:37
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S367/00; Y10S367/901; Y10S367/903
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
SONAR APPARATUS COMPRISING A TRANSMITTING-RECEIVING SONIC-ELECTRIC TRANSDUCER, AN ELECTRIC PULSE TRANSMITTER AND A RECEIVER HAVING A RECEIVING AMPLIFIER, CIRCUIT MEANS CONNECTING SAID TRANSMITTER AND SAID AMPLIFIER AND SAID TRANSDUCER IN SERIES TO FORM A RING, A RESISTOR HAVING A RESISTANCE WHICH DECREASES WITH INCREASING VOLTAGE APPLIED TO THE RESISTOR, SAID RESISTOR BEING CONNECTED OUTSIDE OF THE TRANSDUCER-RECEIVER CHANNEL AND IN SERIES WITH SAID TRANSMITTER FOR PREVENTING SPURIOUS TRANSMITTER VOLTAGES FROM REACHING SAID AMPLIFIER DURING TRANSMITTING PAUSES, AND A SECOND RESISTOR HAVING A RESISTANCE WHICH DECREASES WITH INCREASING VOLTAGE APPLIED THERETO, SAID RESISTOR BEING CONNECTED ACROSS SAID RECEIVER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |